AK.F1.Timing.Model.Collections.DoubleCollectionModelTest.adding_an_item_updates_the_current_delta_type_if_it_has_changed C# (CSharp) 메소드

        public void adding_an_item_updates_the_current_delta_type_if_it_has_changed()
        {
            var model = new DoubleCollectionModel();
            var observer = model.CreateObserver();

            model.Add(1d);
            Assert.Equal(DeltaType.None, model.CurrentDeltaType);
            model.Add(2d);
            Assert.Equal(DeltaType.Increase, model.CurrentDeltaType);
            model.Add(1d);
            Assert.Equal(DeltaType.Decrease, model.CurrentDeltaType);
            model.Add(1d);
            Assert.Equal(DeltaType.None, model.CurrentDeltaType);

            Assert.Equal(3, observer.GetChangeCount(x => x.CurrentDeltaType));
        }